EP2920256B1 - Tintenzusammensetzung zum kontinuierlichem abgelenkten tintenstrahldruck insbesondere auf substraten hergestellt aus organischen polymeren - Google Patents

Tintenzusammensetzung zum kontinuierlichem abgelenkten tintenstrahldruck insbesondere auf substraten hergestellt aus organischen polymeren Download PDF

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Publication number
EP2920256B1
EP2920256B1 EP13791805.8A EP13791805A EP2920256B1 EP 2920256 B1 EP2920256 B1 EP 2920256B1 EP 13791805 A EP13791805 A EP 13791805A EP 2920256 B1 EP2920256 B1 EP 2920256B1
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Prior art keywords
weight
ink composition
solvent
ink
composition according
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English (en)
French (fr)
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EP2920256A1 (de
Inventor
Cécile GOUSTIAUX
Antoine Bataille
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Markem Imaje Holding SAS
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Markem Imaje Holding SAS
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
    • C09D11/104—Polyesters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks
    • C09D11/36—Inkjet printing inks based on non-aqueous solvents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2465/00—Characterised by the use of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers

Definitions

  • the invention relates to an ink composition the properties of which are particularly well-suited for liquid jet marking or printing, and most particularly for continuous deflected ink jet marking, printing.
  • the ink composition according to the invention may be used to mark substrates, supports and objects of all kinds.
  • the ink composition according to the invention is suitable in particular for marking substrates, supports and objects made of organic polymers, particularly thermoplastic polymers ("plastics"), such as polyolefins such as polyethylenes (PE) or polypropylenes (PP), or poly(ethylene terephthalate) (PET).
  • plastics such as polyolefins such as polyethylenes (PE) or polypropylenes (PP), or poly(ethylene terephthalate) (PET).
  • PET poly(ethylene terephthalate)
  • the ink composition according to the invention is particularly suitable for marking bottles or stoppers made of organic polymers, notably polyolefins, such as polyethylenes or polypropylenes.
  • the ink composition according to the invention enables resistant markings to be obtained, which are notably resistant to rubbing and to common solvents such as ethanol, and which are adherent, i.e. which pass the adhesive tape peel test.
  • Ink jet printing is a well-known technique, which allows printing, marking or decoration of all kinds of objects, at high speed, and without any contact between these objects and the printing device, of messages which can be changed at will, such as bar codes, sell-by dates, etc., even on non-planar supports.
  • Ink jet printing techniques are divided into two major types, namely: the technique known as “Drop on Demand” (DOD), and the technique known as “Continuous Ink Jet” (CIJ).
  • DOD Drop on Demand
  • CIJ Continuous Ink Jet
  • Continuous deflected ink jet spraying, printing consists in sending pressurised ink into a cavity containing a piezoelectric crystal, from where the ink escapes through an aperture (nozzle) in the form of a jet.
  • the piezoelectric crystal vibrating at a determined frequency, causes pressure disturbances in the ink jet, which oscillates and is gradually broken up into spherical drops or droplets.
  • An electrode positioned along the path of the jet, where it is broken up, enables these drops to be given an electrostatic charge if the ink is conductive.
  • the drops charged in this manner are deflected in an electric field, and allow printing. Uncharged drops, which are therefore not deflected, are recovered in a groove, gutter, where the ink is sucked up, and then recycled towards the ink circuit.
  • This type of ink spraying in the form of a jet provides contact-free marking at high production line speed on objects which are not necessarily flat, planar, with the possibility of changing the message at will.
  • the technique is particularly suitable for marking and identification (sell-by dates, series numbers, batch numbers, barcodes, etc.) of industrial products on production lines.
  • Ink compositions which are suitable for spraying and printing, using the continuous deflected jet technique, must meet a number of criteria inherent to this technique, concerning, among other elements, viscosity, electrical conductivity, solubility in a solvent for cleaning, compatibility of the ingredients, satisfactory wetting of the supports to be marked, etc.
  • ink compositions for printing by the continuous deflected ink jet technique must meet result firstly from the fact that ink consumption is low when the number of printed characters in each message is small, and secondly from the fact that the jet is continuous and that the ink is recirculated many times before being sprayed.
  • the ink is in contact with ambient air when nondeflected drops are sucked up, and it may absorb ambient moisture or react with the oxygen in the air, and may be modified by this means.
  • ingredients which compose current inks, for printing by the continuous deflected ink jet technique are organic or mineral products; these are dyestuffs, such as dyes or pigments, resins or binders, in one or more solvent(s) which is/are more or less volatile, or in water, optionally one or more conductivity salt(s) and various additives.
  • the dyestuffs are called “dyes or pigments”, depending on whether they are respectively soluble or insoluble in the solvent used.
  • Pigments which are by nature insoluble, are therefore dispersed and may or may not be opaque. They give the ink its colour, its opaqueness, or particular optical properties, such as fluorescence (cf. patents or patent applications US-A-4,153,593 , US-A-4,756,758 , US-A-4,880,465 , EP-A-0 289 141 , US-A-5,395,432 , GB-A-2 298 713 ). In certain cases the dyes also themselves give the ink sufficient conductivity that there is no requirement for a conductivity salt to be added. The dyes known under the name C. I. Solvent Black 27, 29, 35 and 45 are in this case.
  • Binder(s) or resin(s) is/are generally in most cases one or more solid and polymeric compound(s), and the choice of them is dictated by the solubility in the selected solvents and by their compatibility with the dyes and the other additives, but also and above all according to the properties which they give the ink film, when dry (see patents or patent applications US-A-4,834,799 , GB-A-2 286 402 , US-A-5,594,044 , US-A-5,316,575 , WO-A-96/23844 , WO-A-95/29287 ).
  • the solvent of these inks consists most frequently of a mixture comprising, on the one hand, a majority, predominant, amount of volatile and weakly viscous solvents, in order to allow very rapid drying of the markings and to adjust the viscosity to the desired value, for example from 2 to 10 mPa.s and, on the other hand, more viscous and less volatile solvents which dry more slowly, in a smaller amount, in order to prevent the ink from drying in the nozzle during phases when the printing device is not in operation, is shutdown (cf. patents or patent applications US-A-4,155,767 , WO-A-92 14794 , WO-A-92 14 795 and US-A-4,260,531 ).
  • the volatile solvents which are most often used are alcohols, ketones or esters of low molecular weight, as indicated in patents US-A-4,567,213 , and US-A-5,637,139 .
  • these solvents essentially methanol, ethanol, 1- and 2-propanol, acetone, methyl ethyl ketone ("MEK”), methyl-isobutyl ketone, ethyl acetate, and tetrahydrofuran may be mentioned.
  • the less volatile solvents are most commonly ketones, such as cyclohexanone, the glycol ethers, mentioned in documents US-A-4,024,096 and US-A-4,567,213 , ethers and acetals, such as furan or dioxane, mentioned in document US-A-4,155,767 , dimethyl formamide or dimethyl sulfoxide ( US-A-4,155,895 ), lactones ( EP-A-0 034 881 ), N-methyl pyrrolidone ( EP-A-0 735 120 ), glycols ( WO-A-96 23844 ), and even aliphatic hydrocarbons ( US-A-4,166,044 ), or water, alone or in combination with other solvents, mentioned above; reference will be made, in this connection, to documents US-A-4,153,593 , GB-A-2 277 094 and FR-A-2 460 982 .
  • ketones such as cyclohexanone
  • the main or majority, predominant, solvents of inks for deflected continuous ink jet spraying, printing must satisfy a number of criteria, in particular:
  • the additives include dispersants which allow dispersion of the pigments, surfactants which modify the wetting or penetrating power of the ink ( US-A-5,395,431 ), in particular those which modify or regulate the static or dynamic surface tension, such as Fluorad ® FC 430 from the Company 3M ® , agents which inhibit corrosion caused by the salts which confer the conductivity mentioned above (see documents EP-A-0 510 752 , US-A-5,102,458 ), or else additives which protect the ink against proliferation of bacteria and other micro-organisms: this concerns biocides, bactericides, fungicides and others, which are particularly useful in inks containing water, pH-regulating buffers (see EP-A-0 735 120 ), anti-foaming agents.
  • dispersants which allow dispersion of the pigments
  • surfactants which modify the wetting or penetrating power of the ink
  • static or dynamic surface tension such as Fluorad ® FC 430 from the Company 3M
  • bottles are generally marked on the stopper, cap, or on the bottom of the bottle, or on any other location, with corresponding information, immediately after filling.
  • Continuous deflected ink jet technology is, with CO 2 laser marking, the most appropriate technique for this high-speed marking of various information on these curved surfaces.
  • the ink for continuous deflected jet printing and the deposited marking must satisfy particular requirements, notably the following:
  • the adhesive tape test In order to test the adherence of the markings, the adhesive tape test, known as the "Scotch ® test” is very commonly applied. It consists in applying an adhesive tape to the marking, and then in removing this tape. The test is positive when the marking remains on the object and is not transferred to the tape.
  • the ink compositions sprayed by ink jet on substrates such as packagings, made of organic polymers, notably made of plastics, and in particular on substrates made of polyolefins, for example made of polyethylenes or polypropylenes
  • a surface treatment to the substrate, such as a singeing treatment or a corona treatment, and/or to include halogenated compounds, notably chlorinated compounds such as resins based on vinyl chloride, in the ink composition.
  • an ink composition for printing by the continuous deflected ink jet technique which gives markings which notably have satisfactory adherence, or even adherence which is improved compared to known ink compositions, on substrates, such as packagings, made of organic polymers, notably plastics, and in particular on substrates made of polyolefins, for example made of polyethylenes or polypropylenes, without there being any need to apply a surface treatment to the substrate, such as a singeing treatment or a corona treatment, and/or to include halogenated compounds, notably chlorinated compounds, such as resins based on vinyl chloride, in the ink composition.
  • ink compositions for printing by the continuous deflected ink jet technique which gives markings having satisfactory adherence (generally determined by the test known as the "adhesive tape” test), or even improved adherence compared to known ink compositions, on the said substrates, but which are free of halogenated compounds, notably chlorinated compounds, such as resins based on vinyl chloride, where these ink compositions also enable markings to be obtained which are more resistant, notably to rubbing and to alcohol.
  • the aim of the invention is to provide an ink composition which is suitable for continuous deflected ink jet printing, which satisfies, among others, all the needs, requirements and criteria mentioned above, and which does not have the drawbacks, limitations, defects and disadvantages of the ink compositions of the prior art, and which overcomes the problems of the ink compositions of the prior art.
  • an ink composition for continuous deflected ink jet printing which is liquid at ambient temperature, comprising:
  • the said ink composition is advantageously free of halogenated compounds.
  • ambient temperature is understood to mean, generally, a temperature of 5°C to 30°C, preferably 10°C to 25°C, even more preferably 15°C to 24°C, and better still 20°C to 23°C. It is clearly understood that the ink is liquid at atmospheric pressure.
  • the expression "free of halogenated compounds” is understood to mean, generally, that the ink composition according to the invention includes less than 0.1% by weight, or 0% by weight, of the total weight of the ink composition, of halogenated compounds.
  • the ink composition according to the invention is notably free of chlorinated compounds, such as resins based on vinyl chloride, such as poly(vinyl chloride) (PVC).
  • chlorinated compounds such as resins based on vinyl chloride, such as poly(vinyl chloride) (PVC).
  • terpene-phenol resin is understood to mean, generally, resins resulting from polycondensation of phenol and at least one terpene.
  • the terpene may be chosen, for example, from pinenes, such as ⁇ -pinene or ⁇ -pinene, the carenes, dipentene, limonene, and mixtures thereof. Terpenes are generally extracted from the resin of conifers such as pine.
  • a terpene-phenol resin which may be included in the ink composition according to the invention is, for example, the resin available under the name Dertophene T from the company Derives Résiniques et Terpèniques (DRT) of Dax, France (see “Technical Data Sheet” of 9 August 2011).
  • copolyester resins is understood to mean, generally, amorphous copolymers resulting from polycondensation of one or more diacids or of their dialkyl esters (C1 to C6), for example dimethyl on a diol, or else of one or more hydroxyacids on themselves or their lactonic form.
  • copolyesters are amorphous and therefore soluble in organic solvents, unlike crystalline copolymers, which are insoluble in organic solvents.
  • copolyester resins which are included in the ink composition according to the invention do not include prepolymers carrying unsaturated functional groups in order to be polymerisable by radiation, such as the polyester-acrylates.
  • copolyester resins which are included in the ink composition according to the invention include the sequenced, block, copolymers, such as the polyester-polyethers or polyester-amines use as dispersing agents for the pigments.
  • One copolyester resin which may be included in the composition according to the invention is, for example, the resin available under the name Vylon GK 250 ® from the company Toyobo Vylon.
  • the compound having an ethylenically unsaturated double bond and a silicon chain may be chosen notably from among the polydimethylsiloxanes with acrylic functional groups, modified by a polyether; such compounds are available under the names Byk ® -UV 3500 or Byk ® - Silclean 3710 from the company Byk ® .
  • the ink composition according to the invention is defined by a set of specific characteristics, features, which has never been described, or suggested, in the prior art.
  • the ink composition according to the invention comprises a combination of specific compounds which has never been described, or suggested, in the prior art.
  • the ink composition according to the invention comprises a specific binder comprising a combination of two specific compounds, namely the combination of a saturated copolyester resin, and of a terpene-phenol resin which has never been described or suggested in the prior art.
  • this specific binder is moreover combined with a specific compound, namely a compound having an ethylenically unsaturated double bond and a silicon chain.
  • the ink composition according to the invention is preferably, moreover, free of halogenated compounds.
  • the ink composition according to the invention satisfies, among others, the needs, requirements and demands mentioned above, and provides a solution to the problems of the ink compositions of the prior art.
  • the specific combination of the ink according to the invention of two specific compounds in the binder namely a saturated copolyester resin, and a terpene-phenol resin with, in addition, a compound having an ethylenically unsaturated double bond and a silicon chain
  • ink compositions for ink jet printing by the continuous deflected jet technique which give markings of which the adherence (generally determined by the test called the "adhesive tape" test), on organic polymers, notably, plastics, and in particular on polyolefins, for example polyethylenes or polypropylenes, is greater than that of the markings obtained with the ink compositions of the prior art, without there being any requirement, beforehand, to subject the substrate to a surface treatment, and optionally to include halogenated compounds, such as resins based on vinyl chloride, in the ink composition.
  • the ink compositions according to the invention also enable, in a surprising manner, more resistant markings to be obtained, notably markings which are resistant to rubbing and to alcohol in particular, on organic polymers, notably plastics, and in particular on polyolefins, for example polyethylenes or polypropylenes, than the markings obtained with the ink compositions of the prior art which do not include a binder with the combination of two specific compounds according to the invention, this binder being itself combined with a compound having an ethylenically unsaturated double bond and a silicon chain.
  • the compound having an ethylenically unsaturated double bond and a silicon chain chosen notably from among the polydimethylsiloxanes with acrylic functional groups modified by a polyether, is currently used as a "surface" additive in coating formulations which can be polymerised under the action of radiation, in order to facilitate cleaning of the surface of these coatings.
  • this compound is able to provide an adherence effect of the marking on organic polymers, such as plastics, and of resistance to peeling by tape, in the ink composition according to the invention, which is far remote from a coating composition which is polymerisable to facilitate cleaning thereof, i.e. a composition for which the aims sought are different from those which it is sought to attain with the composition of the invention.
  • the ink composition of this document may also include chlorinated resins such as poly(vinyl chloride), poly(vinylidene chloride) and chlorinated rubbers.
  • Document US-B2-7,022,172 relates to an ink composition for ink jet printing which notably includes a resin and a dispersing agent.
  • a resin e.g., a polystyrene resin
  • a dispersing agent e.g., a polyester-amine.
  • the ink composition may include a copolyester such as the one present in the ink composition according to the invention, and a compound having an ethylenically unsaturated double bond and a silicon chain.
  • the ink composition of this document may include chlorinated resins such as the vinyl chloride-acetate resins.
  • compositions may contain polyester resins and terpene resins, which are cited among very many other polymers and resins.
  • the cited terpene resins are not resins derived from polycondensation of phenol and terpenes, but resins obtained solely from terpenes.
  • the ink composition may include a compound having an ethylenically unsaturated double bond and a silicon chain.
  • the ink composition of this document may include chlorinated polymers such as copolymers of vinyl chloride, or copolymers of vinylidene chloride.
  • Documents US-B2-7,132,014 , US-B2-7,132,013 , and US-B2-7,014,698 relate to pigmented ink compositions for ink jet printing which contain a pigment, a polymer and an organic solvent comprising a derivative of poly(alkylene glycol) and a nitrogen-containing heterocyclic compound.
  • the polymer may be a binding resin chosen from among the acrylic resins, the polyester resins, the polyurethane resins, the vinyl chloride resins and the cellulosic resins.
  • polyester resin may be a copolyester resin such as the one present in the ink composition according to the invention.
  • the ink composition may include a terpene-phenol resin such as the one present in the ink composition according to the invention, and a compound having an ethylenically unsaturated double bond and a silicon chain.
  • the ink compositions of these documents may include vinyl chloride resins.
  • the ink compositions according to the invention give markings, which are resistant to rubbing, resistant to the adhesive tape test ("Scotch ® " test), and resistant to rubbing in the presence of alcohol.
  • the ink compositions according to the invention preferably contain no chlorinated compound such as resins based on vinyl chloride.
  • the ink composition according to the invention advantageously comprises 0.1% to 30% by weight, preferably 2% to 20% by weight, of the total weight of the ink composition, of the saturated copolyester resin.
  • the ink composition according to the invention advantageously comprises 0.1% to 15% by weight, preferably 1% to 10% by weight, of the total weight of the ink composition, of the terpene-phenol resin.
  • the ink composition according to the invention advantageously comprises 0.01% to 5% by weight, preferably 0.01% to 2% by weight, of the total weight of the ink composition, of the compound having an ethylenically unsaturated double bond and a silicon chain.
  • the binder may comprise only the saturated copolyester resin and the terpene-phenol resin, meaning that the binder then consists of the saturated copolyester resin, and the terpene-phenol resin.
  • the binder may comprise, in addition to the saturated copolyester resin and the terpene-phenol resin, one or more other polymers and/or resins.
  • This or these other polymer(s) and/or resin(s) may advantageously be chosen from among the (meth)acrylic, vinylic, ketonic, hydroxyaromatic, cellulosic, styrenic or epoxy resins, the polyurethanes, the styrene-acrylates, the alkoxysilanes, and the combinations of two or more of these.
  • the binder advantageously represents 1% to 45% by weight, preferably 5% to 30% by weight, more preferably 10% to 20% by weight, of the total weight of the ink composition according to the invention.
  • the ink composition according to the invention comprises a very small quantity of water, generally less than 10% by weight, preferably less than 5%, and even more preferably less than 1% by weight, compared to the total weight of the ink composition.
  • the ink composition according to the invention may even be considered to be essentially water-free (0% water).
  • the water that is present is only added water, which is found as an impurity in the various components of the ink.
  • the low water content or absence of water in the ink composition according to the invention favours the formation of the ink film when the binders and other dyes of the composition are insoluble in water, by this means improving the resistance and adherence properties of the ink.
  • the solvent generally represents at least 20% by weight of the total weight of the ink composition, the solvent preferably represents 30% to 90% by weight, more preferably 60% to 80% by weight, of the total weight of the ink composition.
  • the solvent comprises, and preferably consists of, one or more organic solvent compound(s) and optionally water, provided that the quantity of water satisfies the conditions mentioned above.
  • the said organic solvent compound(s) advantageously comprise(s) a majority (predominant) proportion by weight, compared to the total weight of the solvent (50% by weight of the total weight of the solvent or more, or even up to 100% by weight of the total weight of the solvent), of one or more volatile organic solvent compound(s), and a minority proportion by weight, compared to the total weight of the solvent, of one or more non-volatile organic solvent compound(s).
  • the solvent preferably consists of one or more volatile organic solvent compound(s).
  • volatile organic solvent compound is generally understood to mean that this compound has a speed of evaporation of greater than 0.5 on the scale in which butyl acetate has a speed of evaporation equal to 1.
  • the said organic solvent compound(s) that is(are) part of the solvent is/are chosen, for example, from the alcohols, in particular the alcohols of low molecular weight, for example the aliphatic alcohols such as ethanol; the ketones, preferably of low molecular weight; the ethers of alkylene glycols; the esters of alkylene glycols and the esters of ethers of alkylene glycols, such as the acetates; dimethyl formamide; N-methyl pyrrolidone; the acetals; the esters; the linear or cyclic ethers; the aliphatic hydrocarbons, whether cyclic or linear; the aromatic hydrocarbons; and the carbonates such as propylene carbonate, ethylene carbonate and the dimethyl- and diethyl-carbonates; and mixtures thereof.
  • the alcohols in particular the alcohols of low molecular weight, for example the aliphatic alcohols such as ethanol; the ketones, preferably of low molecular weight; the ether
  • This or these solvent compound(s) preferably has/have the property of dissolving the other ingredients of the ink, notably the binder, the dyestuffs, the additives, etc.
  • the alcohols will preferably be chosen from among the linear or branched aliphatic alcohols of 1 to 8 carbon atoms, such as methanol, ethanol, propanol-1, propanol-2, n-butanol, butanol-2, tert-butanol, etc.
  • the ketones will preferably be chosen from among the ketones with 3 to 10 carbon atoms, such as acetone, butanone (methyl-ethyl-ketone), pentanone-2 (methyl-propyl-ketone), methyl-3 butanone-2 (methyl-isopropyl ketone) and methyl-4 pentanone-2 (methyl-isobutyl-ketone).
  • the ethers of alkylene glycols are preferably chosen from among the mono-alkyl ethers (C1 to C6 alkyl group) or dialkyl ethers (C1 to C6 alkyl groups) of alkylene glycol comprising 1 to 10 carbon atoms in the alkylene chain; these are preferably ethers of ethylene glycol or propylene glycol, such as methoxy-propanol.
  • esters of alkylene glycols and the esters of ethers of alkylene glycols are preferably chosen from among the esters of the latter with the saturated aliphatic, carboxylic acids with 1 to 6 carbon atoms, such as formic acid, acetic acid, propionic acid, butyric acid, valeric acid and caproic acid.
  • Methoxypropyl acetate, butyldiglycol acetate, etc. may for example be mentioned.
  • the esters are chosen, preferably, from among the esters of low molecular weight such as the formates, the acetates, the propionates or the butyrates of alcohols with 1 to 10 carbon atoms.
  • the acetals are preferably chosen from among the acetals of low molecular mass such as ethylal and methylal.
  • the ethers are preferably chosen from among the ethers of low molecular mass such as dioxolane or tetrahydrofuran.
  • a preferred solvent according to the invention comprises a majority amount by weight, compared to the total weight of the solvent, and preferably consists of, one or more solvent compound(s) chosen from among the ketones with 3 to 10 carbon atoms such as acetone, butanone (methyl-ethyl-ketone or MEK), pentanone-2 (methyl-propyl-ketone), methyl-3 butanone-2 (methyl-isopropyl-ketone) and methyl-4 pentanone-2 (methyl-isobutyl-ketone or MIK).
  • solvent compound(s) chosen from among the ketones with 3 to 10 carbon atoms such as acetone, butanone (methyl-ethyl-ketone or MEK), pentanone-2 (methyl-propyl-ketone), methyl-3 butanone-2 (methyl-isopropyl-ketone) and methyl-4 pentanone-2 (methyl-isobutyl-ketone or MIK).
  • a particularly preferred solvent comprises a majority amount by weight, compared to the total weight of the solvent, of MEK, and preferably consists of MEK.
  • This preferred solvent may further comprise one or more other solvent compound(s) other than the ketone(s) in a minority total amount by weight, compared to the total weight of the solvent, for example in an amount of 0.1% to 20% by weight, preferably 5% to 15% by weight, compared to the total weight of the solvent, in order to optimise the properties of the inks.
  • These minority solvents may be chosen from among the esters, the ethers of ethylene glycol or of propylene glycol, and the acetals.
  • the dye(s) and/or pigment(s) may be chosen from among all the dyes or pigments suitable for the sought use, known to the man skilled in the art; some of these pigments or dyes have already been mentioned above.
  • the dyes and the pigments will generally be chosen from among the dyes and pigments known under the name "C. I. Solvent Dyes” and "C. I. Pigments”.
  • the pigments also include lacquers.
  • a dye will preferably be chosen with the lowest water solubility, which is insoluble in water.
  • dye which is insoluble in water is generally understood to mean a dye which, added in an amount of 1% to demineralised water, causes no colouration of the water visible to the eye.
  • the dye(s) is/are advantageously chosen from among the organic dye(s) which are soluble in ketones.
  • the pigment(s) may advantageously be chosen from among carbon blacks, titanium oxides, and mixtures thereof.
  • a preferred dye is C.I. Solvant Black 27.
  • the total amount of dye(s) and/or of pigment(s) is generally 0.05% to 25% by weight, preferably 1% to 20% by weight, more preferably 3% to 10% by weight, of the total weight of the ink composition.
  • the ink composition may further comprise one or more plasticiser(s) (of the resin(s) or polymer(s) or compounds of the binder) chosen, for example, from among the plasticisers known to the man skilled in the art, and chosen according to the binder used comprising one or more polymer(s) and/or resin(s); as plasticisers may, for example, be cited thermoplastic polyurethanes, phthalates, adipates, citrates and esters of citric acid, alkyl phosphates, glycerol, lactic acid, oleic acid, polypropylene glycol, triglycerides of fatty acids, levulinic acid; and mixtures thereof.
  • the plasticiser(s) is/are generally present in an amount of at least 0.05% by weight, preferably 0.1% to 20% by weight, of the total weight of the ink composition.
  • the ink composition according to the invention may also optionally comprise at least one conductivity salt.
  • the ink composition according to the invention since the ink composition according to the invention is applied by continuous deflected jet, it must have sufficient electrical conductivity, generally greater than 5 ⁇ S/cm at 20°C, preferably greater than or equal to 300 ⁇ S/cm at 20°C, and more preferably greater than or equal to 500 ⁇ S/cm at 20°C.
  • the conductivity of the ink composition according to the invention may be, for example, 5 to 5000 ⁇ S/cm at 20°C, notably 500 to 2000 ⁇ S/cm at 20°C.
  • the products imparting the ink with the conductivity required for continuous jet spraying are ionisable compounds, such as salts. It is possible that dyes, pigments, or other ingredients of the ink are themselves salts, and give the ink sufficient conductivity for there to be no requirement to add a conductivity salt as such: this is the case notably of compounds known by the name "C. I. Solvent Black 27, 29, 35 and 45", already mentioned above.
  • At least one conductivity salt which is different from the dyes, pigments and other ingredients.
  • conductivity salt is understood to mean a salt which gives the ink composition electrical conductivity.
  • This/these conductivity salt(s) is/are generally chosen from among the salts of alkaline metals, alkaline earths and simple or quaternary ammonium compounds, in the form of nitrates, thiocyanates, formates, acetates, sulphates, propionates, hexafluorophosphates, hexafluoroantimonates, etc.
  • this/these conductivity salt(s) will be chosen from among those which are insoluble in water (i.e., generally, the solubility of which in water is less than 0.5% by weight), such as the quaternary ammonium compounds with a fatty chain and the hexafluorophosphates or hexafluroantimonates.
  • This/these conductivity salt(s) will be present, if necessary, in the ink composition so as to give the ink the above conductivity, generally in an amount of at least 0.05% by weight, preferably 0.1% to 20% by weight, more preferably 0.1% to 10% by weight, and better still 0.1% to 5% by weight, of the total weight of the ink composition.
  • composition according to the invention may further comprise one or more additive(s) chosen from among the compounds which improve the solubility of certain of these components, the printing quality, the adherence, or else the control of the wetting of the ink on different supports.
  • the additive(s) may be chosen, for example, from among the anti-foaming agents; the chemical stabilizers; the ultraviolet stabilizers; the surfactants, such as Fluorad ® FC 430 or Byk ® 333; the agents inhibiting the corrosion by the salts; the bactericides, the fungicides and the biocides; and the pH-regulating buffers, etc.
  • the additive(s) is/are used in very low doses, generally less than or equal to 5 % and sometimes as low as 0.01 %, depending on whether they are anti-foaming agents, stabilizers or surfactants.
  • the invention also relates to a method of marking a substrate, support or object by spraying on a surface of this substrate, support or object an ink composition by the continuous deflected ink jet technique in which the sprayed ink composition is the ink composition according to the invention as described above.
  • the surface of the substrate, support or object is not generally subjected to any surface treatment other than simple cleaning. In other words, the surface is not subjected to any activation treatment.
  • the invention also relates to a substrate, support or object provided with a marking obtained by drying, and/or absorption in the substrate, support or object, of the ink composition according to the invention.
  • This substrate may be porous or non-porous.
  • This substrate may be made of metal, for example aluminium or steel; of glass; of ceramic; of a material containing cellulose such as paper, optionally coated or glazed, of cardboard or of wood; of organic polymer, notably of thermoplastic polymer, preferably chosen from among the PVCs, the PETs, the polyolefins, such as the polyethylenes (PE), and the polypropylenes (PP); of poly(methyl methacrylate) or PMMA, also called "Plexiglas"; of fabric; or of any other non-porous or porous substance, or of a composite of several of the above materials.
  • thermoplastic polymer preferably chosen from among the PVCs, the PETs, the polyolefins, such as the polyethylenes (PE), and the polypropylenes (PP); of poly(methyl methacrylate) or PMMA, also called "Plexiglas"; of fabric; or of any other non-porous or porous substance, or of a composite of several of the above materials.
  • a preferred substrate is a substrate made of polyolefin, for example made of polyethylene.
  • the substrate may be of any shape, even a complex shape; it may in particular be a curved surface, for example of the surface of a packaging or container, such as a bottle, or the surface of a stopper, cap.
  • Markings and printing are obtained which are of excellent quality and resistant on all substrates, even substrates having very low porosities, particularly on substrates made of polyolefins, for example made of polyethylene, even of complex shapes such as packaging or containers such as bottles, or stoppers; made of a polyolefin, for example made of a polyethylene or of a polypropylene.
  • Ink compositions were prepared by mixing the products mentioned in table I below, in the stated proportions.
  • the viscosities and conductivities of the obtained inks are also given in Table I below.
  • ink compositions of examples n°1 and n°2 are ink compositions according to the invention.
  • the ink composition of the comparative example is an ink composition which contains no terpene-phenol resin, and which is not in accordance with the invention.
  • Table I Constituents (percentages by mass) Comparative example Example N°1 Example N°2 Methyl-ethyl ketone 79.3 77.3 76.3 Terpene-Phenol resin (Dertophene T ® of DRT) 0 3 3 Polyester resin (Vylon GK 250 ® of Toyobo) 14 14 14 Byk ® - UV 3500 0.7 Byk ® - Silclean 3710 0.7 0.7 Solvent Black 27 (Neozapon noir X51) 6 5 6 Viscosity (mPa.s) 3.86 4.35 4.44 Conductivity ( ⁇ S/cm). 730 525 651
  • the inks prepared in this manner were deposited using Markem-Imaje ® 9040 printers, which use the technique of continuous deflected jet printing, on polyethylene bottles.
  • Comparative inks 5182 and 5506 include neither terpene-phenol resin, nor polyester resin.
  • the ink of the comparative example contains no terpene-phenol resin.
  • the inks of examples 1 and 2 in accordance with the invention show much better performance than comparative inks 5182 and 5506, and the ink of the comparative example.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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Claims (16)

  1. Tintenzusammensetzung zum kontinuierlichen abgelenkten Tintenstrahldrucken, welche bei Umgebungstemperatur flüssig ist, umfassend:
    a) ein Lösungsmittel umfassend, vorzugsweise bestehend aus, eine(r) oder mehrere(n) organische(n) Lösungsmittelverbindung(en), und gegebenenfalls Wasser;
    b) ein Bindemittel, umfassend ein gesättigtes Copolyesterharz und ein Terpen-PhenolHarz;
    c) eine Verbindung mit einer ethylenisch ungesättigten Doppelbindung und einer Siliciumkette;
    d) gegebenenfalls einen oder mehrere Farbstoff(e) und/oder Pigment(e).
  2. Tintenzusammensetzung gemäß Anspruch 1, welche frei von halogenierten Verbindungen ist.
  3. Tintenzusammensetzung gemäß Anspruch 1 oder 2, welche 0,1 bis 30 Gew.-%, vorzugsweise 2 bis 20 Gew.-%, bezogen auf das Gesamtgewicht der Tintenzusammensetzung, des gesättigten Copolyesterharzes umfasst, und/oder welche 0,1 bis 15 Gew.-%, vorzugsweise 1 bis 10 Gew.-%, bezogen auf das Gesamtgewicht der Tintenzusammensetzung, des Terpen-Phenol-Harzes umfasst, und/oder welche 0,01 bis 5 Gew.-%, vorzugsweise 0,01 bis 2 Gew.-%, bezogen auf das Gesamtgewicht der Tintenzusammensetzung, der Verbindung mit einer ethylenisch ungesättigten Doppelbindung und einer Siliciumkette umfasst, und/oder in welcher das Bindemittel 1 bis 45 Gew.-%, vorzugsweise 5 bis 30 Gew.-%, mehr bevorzugt 10 bis 20 Gew.-% des Gesamtgewichts der Tintenzusammensetzung darstellt.
  4. Tintenzusammensetzung gemäß einem der vorangehenden Ansprüche, umfassend weniger als 10 Gew.-%, vorzugsweise weniger als 5 Gew.-%, mehr bevorzugt weniger als 1 Gew.-% und noch besser 0 Gew.-% Wasser, im Verhältnis zu dem Gesamtgewicht der Tintenzusammensetzung.
  5. Tintenzusammensetzung gemäß einem der vorangehenden Ansprüche, in welcher das Lösungsmittel wenigstens 20 Gew.-% des Gesamtgewichts der Tintenzusammensetzung darstellt; vorzugsweise stellt das Lösungsmittel 30 bis 90 Gew.-%, mehr bevorzugt 60 bis 80 Gew.-% des Gesamtgewichts der Tintenzusammensetzung dar.
  6. Tintenzusammensetzung gemäß einem der vorangehenden Ansprüche, in welcher die organische(n) Lösungsmittelverbindung(en) einen Mehrheitsgewichtsanteil, im Verhältnis zu dem Gesamtgewicht des Lösungsmittels, von einer oder mehreren flüchtigen organischen Lösungsmittelverbindung(en) und einen Minderheitsgewichtsanteil, im Verhältnis zu dem Gesamtgewicht des Lösungsmittels, von einer oder mehreren nicht-flüchtigen organischen Lösungsmittelverbindung(en) umfasst (umfassen); vorzugsweise besteht das Lösungsmittel aus einer oder mehreren flüchtigen organischen Lösungsmittelverbindung(en).
  7. Tintenzusammensetzung gemäß einem der vorangehenden Ansprüche, in welcher das Lösungsmittel eine Mehrheitsgewichtsmenge, im Verhältnis zu dem Gesamtgewicht des Lösungsmittels, von einer oder mehreren Lösungsmittelverbindung(en) umfasst und vorzugsweise daraus besteht, ausgewählt aus den Ketonen mit 3 bis 10 Kohlenstoffatomen wie Aceton, Butanon (Methylethylketon oder MEK), Pentan-2-on (Methylpropylketon), 3-Methylbutan-2-on (Methylisopropylketon) und 4-Methyl-pentan-2-on (Methylisobutylketon oder MIK); vorzugsweise umfasst die Tintenzusammensetzung außerdem eine oder mehrere Lösungsmittelverbindung(en), die von dem Keton (den Ketonen) verschieden sind, in einer Minderheitsgesamtgewichtsmenge, im Verhältnis zu dem Gesamtgewicht des Lösungsmittels, beispielsweise in einer Menge von 0,1 bis 20 Gew.-%, vorzugsweise 5 bis 15 Gew.-%, im Verhältnis zu dem Gesamtgewicht des Lösungsmittels.
  8. Tintenzusammensetzung gemäß einem der vorangehenden Ansprüche, in welcher der Farbstoff (die Farbstoffe) und/oder das Pigment (die Pigmente) aus den Farbstoffen und Pigmenten, die unter dem Namen "C. I. Solvent Dyes" und "C. I. Pigments" bekannt sind, wie etwa C. I. Solvent Black 29, C. I. Solvent Black 27, C. I. Solvent Black 7, C. I. Solvent Black 28, C. I. Solvent Black 35, C. I. Solvent Blue 45, C. I. Solvent Blue 70, C. I. Solvent Red 124, den Dispersionen von Pigment Blue 60, von Pigment Blue 15, von Pigment Black 7 oder von Pigment White 6; den Fluoreszenzfarbstoffen; und den optischen Aufhellern ausgewählt ist/sind.
  9. Tintenzusammensetzung gemäß einem der vorangehenden Ansprüche, in welcher die Gesamtmenge von Farbstoff(en) und/oder von Pigment(en) 0,05 bis 25 Gew.-%, vorzugsweise 1 bis 20 Gew.-%, mehr bevorzugt 3 bis 10 Gew.-%, des Gesamtgewichts der Tintenzusammensetzung beträgt.
  10. Tintenzusammensetzung gemäß einem der vorangehenden Ansprüche, außerdem umfassend einen oder mehrere Weichmacher.
  11. Tintenzusammensetzung gemäß einem der vorangehenden Ansprüche, welche eine elektrische Leitfähigkeit von mehr als 5 µS/cm bei 20 °C, vorzugsweise mehr als oder gleich 300 µS/cm bei 20 °C und mehr bevorzugt größer als oder gleich 500 µS/cm bei 20 °C aufweist.
  12. Tintenzusammensetzung gemäß einem der vorangehenden Ansprüche, außerdem umfassend wenigstens ein Leitfähigkeitssalz, vorzugsweise ausgewählt aus den Leitfähigkeitssalzen, welche in Wasser unlöslich sind; vorzugsweise ist das Leitfähigkeitssalz / sind die Leitfähigkeitssalze in einer Menge von wenigstens 0,05 Gew.-%, vorzugsweise in einer Menge von 0,1 bis 20 Gew.-%, mehr bevorzugt von 0,1 bis 10 Gew.-% und noch besser von 0,1 bis 5 Gew.-%, bezogen auf das Gesamtgewicht der Tintenzusammensetzung, vorhanden.
  13. Tintenzusammensetzung gemäß einem der vorangehenden Ansprüche, außerdem umfassend ein oder mehrere Additiv(e) ausgewählt aus den Antischaummitteln; den chemischen Stabilisatoren; den Ultraviolettstabilisatoren; den oberflächenaktiven Stoffen; den Wirkstoffen, die eine Korrosion durch die Salze hemmen; den Bakteriziden, den Fungiziden und den Bioziden; und den pH-regelnden Puffern.
  14. Verfahren zum Markieren eines Substrats, Trägers oder Gegenstands durch Sprühen einer Tintenzusammensetzung durch die kontinuierliche abgelenkte Tintenstrahlmethode auf eine Oberfläche dieses Substrats, Trägers oder Gegenstands, in welchem die gesprühte Tintenzusammensetzung die Tintenzusammensetzung gemäß einem der Ansprüche 1 bis 13 ist; und in welchem, vorzugsweise, vor dem Sprühen der Tintenzusammensetzung, die Oberfläche des Substrats, Trägers oder Gegenstands keiner Oberflächenbehandlung außer einer einfachen Reinigung unterzogen wird.
  15. Substrat, Träger oder Gegenstand, das bzw. der mit einer Markierung versehen ist, die durch Trocknen und/oder Absorption der Tintenzusammensetzung gemäß einem der Ansprüche 1 bis 13 in dem Substrat, Träger oder Gegenstand erhalten wird.
  16. Substrat, Träger oder Gegenstand gemäß Anspruch 15, welches bzw. welcher aus Metall, z.B. Aluminium oder Stahl; aus Glas; aus Keramik; aus einem Cellulose enthaltenden Material wie Papier, gegebenenfalls beschichtet oder glasiert, aus Pappe oder aus Holz; aus organischem Polymer, namentlich aus thermoplastischem Polymer, vorzugsweise ausgewählt aus den PVCs, den PETs, den Polyolefinen, wie etwa den Polyethylenen (PE), und den Polypropylenen (PP); aus Poly(methylmethacrylat) PMMA, auch "Plexiglas" genannt; aus Gewebe; oder aus irgendeiner anderen nicht-porösen oder porösen Substanz, oder aus einem Verbundstoff von mehreren der vorstehenden Materialien gefertigt ist; vorzugsweise ist das Substrat, der Träger oder der Gegenstand eine Verpackung oder ein Behälter, wie eine Flasche; oder ein Verschluss; hergestellt aus einem Polyolefin, z.B. einem Polyethylen oder einem Polypropylen.
EP13791805.8A 2012-11-15 2013-11-14 Tintenzusammensetzung zum kontinuierlichem abgelenkten tintenstrahldruck insbesondere auf substraten hergestellt aus organischen polymeren Active EP2920256B1 (de)

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FR1260874A FR2997956B1 (fr) 2012-11-15 2012-11-15 Composition d'encre pour l'impression par jet continu devie notamment sur des substrats en polymeres organiques.
PCT/EP2013/073828 WO2014076181A1 (en) 2012-11-15 2013-11-14 Ink composition for continuous deflected ink jet printing notably on substrates made of organic polymers

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FR2997956B1 (fr) 2015-04-10
US9546289B2 (en) 2017-01-17
CN104919014B (zh) 2017-11-28
WO2014076181A1 (en) 2014-05-22
EP2920256A1 (de) 2015-09-23
CN104919014A (zh) 2015-09-16
US20160272827A1 (en) 2016-09-22

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